Visible-Light-Mediated Oxidative Dimerization of Arylalkynes in the Open Air: Stereoselective Synthesis of (<i>Z</i>)-1,4-Enediones
作者:Donglei Wei、Fushun Liang
DOI:10.1021/acs.orglett.6b02926
日期:2016.11.18
An organic photoredox catalytic one-pot protocol is developed for the highly stereoselective synthesis of (Z)-1,4-enediones. The reaction starts directly from alkyne precursors, using 4-(4-cyanophenyl)-2,6-diphenylpyrylium tetrafluoroborate (CN-TPT) as an efficient photosensitizer and dioxygen in the air as a green oxidant. A Csp–Csp oxidative coupling/[4 + 2] cyclization (with dioxygen)/fragmentive
A Highly Tunable Stereoselective Dimerization of Methyl Ketone: Efficient Synthesis of <i>E</i>- and <i>Z</i>-1,4-Enediones
作者:Kun Xu、Yang Fang、Zicong Yan、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/ol4006344
日期:2013.5.3
A newmethod for the tunable synthesis of 1,4-enedione directly from aromatic methyl ketone is described. This tandem reaction enables the construction of symmetric and unsymmetric 1,4-enediones with complete E-selectivity. Moreover, the resulting E-1,4-enedione could be transformed into a Z-isomer by irradiation with 23 W of white light.
Eine milde und einfache Synthese von Benzo[<i>c</i>]thiophenen und 4,7-Dihydrobenzo[<i>c</i>]thiophenen
作者:Wolfgang Volz、Jürgen Voß
DOI:10.1055/s-1990-26976
日期:——
A Mild and Simple Synthesis of Benzo[c]thiophenes and 4, 7-Di-hydrobenzo[c]thiophenes The synthesis of 1,3-disubstituted benzo[c]thiophenes and 4, 7-dihydrobenzo[c]thiophenes from o-diacylbenzenes and 4, 5-diacyl-cyclohexenes under very mild conditions is described.